雷达层析成像技术对粮仓储量信息的探测
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摘要
针对仓储粮食实际储量的检测问题,提出了一种无损探测方法。根据粮食介电常数与密度的关系,采用波速层析和衰减层析算法对粮食的介电常数进行反演,从而实现仓内粮食体密度的估算;同时,采用速度和衰减联合层析成像技术,对粮仓实际储粮高度进行成像,并对可能存在的异物大小、形状进行成像,从而得到实际储粮体积;最后由粮食密度和实际储粮体积,实现对粮仓实际储量的估算。仿真结果证实了应用层析成像技术进行粮仓储量探测的有效性。
Radar tomography technology as a non-destructive testing method is proposed to detect reserves of barn. The permittivity of grain in the barn can be obtained by velocity and attenuation tomography inversion method. Then the density of the grain can be calculated based on the relationship between permittivity and grain density. At the same time,the actual height of grain and the shape of unconventionality objects in the barn can be imaged by velocity and attenuation tomography image method. Actual bulk of the grain can be calculated with the information of actual height and the size of unconventional objects. Based on the density and bulk information of barn,the practical reserves can be achieved. Simulation results verify the effectiveness of the proposed method.
Radar tomography technology as a non-destructive testing method is proposed to detect reserves of barn. The permittivity of grain in the barn can be obtained by velocity and attenuation tomography inversion method. Then the density of the grain can be calculated based on the relationship between permittivity and grain density. At the same time,the actual height of grain and the shape of unconventionality objects in the barn can be imaged by velocity and attenuation tomography image method. Actual bulk of the grain can be calculated with the information of actual height and the size of unconventional objects. Based on the density and bulk information of barn,the practical reserves can be achieved. Simulation results verify the effectiveness of the proposed method.
引文
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[14]方广有,张忠治,汪文秉.无载频脉冲探地雷达性能分析及其FD-TD法数值模拟计算[J].电波科学学报,1997,12(1):44-50.FANG Guangyou,ZHANG Zhongzhi,WANG Wen-bing.Study about the properties of a carrier-free pulse ground penetrating radar and their numerical simulation by2.5D FD-TD method[J].Chinese Jour-nal of Radio Science,1997,12(1):44-50.(in Chinese)
[15]国家粮食局.LS/T1700～1712-2004粮食信息分类与编码[S].北京:中国标准出版社,2005.
[2]TRABELSI S,NELSON S O.Unified microwave moisture sensing technique for grain and seed[J].Measurement Science and Technology,2007,18(4):997-1003.
[3]TRABELSI S,KRASZEWSKI A W,NELSON S O.A microwave method for on-line determination of bulk density and moisture content of particulate materials[J].IEEE Transactions on Instrumentation and Meas-urement,1998,47(1):127-132.
[4]TRABELSI S,NELSON S O.On the accuracy of bulk density and moisture content prediction in wheat from near-field free-space measurements[J].Technisches Messen,2007,74(5):280-289.
[5]ZHOU Chaoguang,LIU Lanbo,LANE JR J W.Non-linear inversion of borehole-radar tomography data to reconstruct velocity and attenuation distribution in earth materials[J].Journal of Applied Geophysics,2001,47(3):271-284.
[6]丁鹭飞,耿富录.雷达原理[M].3版.西安:西安电子科技大学出版社,2002:128-129.
[7]陈洁,超宽带雷达信号处理及成像方法研究[D].北京:中国科学院电子学研究所,2007.CHEN Jie.Research on signal processing and imaging of ultra-wideband radar[D].Beijing:Institute of Elec-tronics,Chinese Academy of Sciences,2007.(in Chi-nese)
[8]粟毅,黄春琳,雷文太.探地雷达理论与应用[M].北京:科学出版社,2006:45-47.
[9]段心标,金维浚.井间层析成像混合最短射线追踪旅行时反演[J].工程地球物理学报,2007,4(3):201-206.DUAN Xinbiao,JIN Weijun.Travel time inversion by hybrid shortest path ray tracing in crosshole tomo-graphy[J].Chinese Journal of Engineering Geophysics.2007,4(3):201-206.(in Chinese)
[10]赵连锋.井间地震波速与衰减联合层析成像方法研究[D].四川成都:成都理工大学,2003.ZHAO Lianfeng.Study on crosswell seismic tomo-graphy combining velocity and attenuation[D].Chengdu Sichuan:Chengdu University of Technolo-gy,2003.(in Chinese)
[11]张建中,陈世军,余大祥.最短路径射线追踪方法及其改进[J].地球物理学进展,2003,18(1):146-150.ZHANG Jianzhong,CHEN Shijun,YU Daxiang.Im-provement of shortest path ray tracing method[J].Progress in Geophysics,2003,18(1):146-150.(in Chinese)
[12]曾昭发,刘四新,王者江,等.探地雷达方法原理及应用[M].北京:科学出版社,2006:102-103.
[13]杨薇,刘四新,冯彦谦.跨孔层析成像LSQR算法研究[J].物探与化探,2008,32(2):199-202.YANG Wei,LIU Sixin,FENG Yanqian.A study of the LSQR algorithm for cross-hole tomography[J].Geophysical&Geochemical Exploration,2008,32(2):199-202.(in Chinese)
[14]方广有,张忠治,汪文秉.无载频脉冲探地雷达性能分析及其FD-TD法数值模拟计算[J].电波科学学报,1997,12(1):44-50.FANG Guangyou,ZHANG Zhongzhi,WANG Wen-bing.Study about the properties of a carrier-free pulse ground penetrating radar and their numerical simulation by2.5D FD-TD method[J].Chinese Jour-nal of Radio Science,1997,12(1):44-50.(in Chinese)
[15]国家粮食局.LS/T1700～1712-2004粮食信息分类与编码[S].北京:中国标准出版社,2005.
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